Can I alter the GTAP model and still use RunGTAP?

Yes, you can, if have GEMPACK and know how to use it. You can create either GEMSIM or Fortran models.

See Changing the economics of RunGTAP -- Overview.

See also un-omitting variables.

To create new EXE files (which run faster, cope with larger datasets, and can be distributed to others), you need the full source code version of GEMPACK with Fortran compiler.

Obviously it is assumed that you are a complete expert in GEMPACK.

URL of this topic: www.copsmodels.com/webhelp/rungtap/hc_altergtap.htm

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